Ardmore, OK planting zone & frost dates

Ardmore is in USDA hardiness zone 8a. The last spring frost usually comes around March 15 and the first fall frost around November 14, for a growing season of about 244 days.

USDA hardiness zone8aavg. extreme winter low 10°F to 15°F

Average last spring frostMarch 1590% chance of no frost after April 2

Average first fall frostNovember 1410% chance of frost by October 29

Growing season244 daysfrost-free days in an average year

Planting calendar for Ardmore

Dates are counted from the average last spring frost (March 15) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.

Crop	When
Tomatoes	Start seeds indoors: Jan 18 – Feb 1 Transplant outdoors: Mar 22 – Mar 29
Peppers	Start seeds indoors: Jan 4 – Jan 18 Transplant outdoors: Mar 29 – Apr 5
Eggplant	Start seeds indoors: Jan 4 – Jan 18 Transplant outdoors: Mar 29 – Apr 5
Broccoli	Start seeds indoors: Jan 4 – Jan 18 Transplant outdoors: Feb 15 – Mar 1
Cabbage	Start seeds indoors: Jan 4 – Jan 18 Transplant outdoors: Feb 15 – Mar 1
Onions (sets)	Plant outdoors: Feb 15 – Mar 1
Peas	Sow outdoors: Feb 1 – Feb 15
Spinach	Sow outdoors: Feb 1 – Feb 15
Lettuce	Sow outdoors: Feb 15 – Mar 1
Carrots	Sow outdoors: Feb 15 – Mar 1
Potatoes	Plant outdoors: Feb 15 – Mar 1
Beans	Sow outdoors: Mar 22 – Mar 29
Sweet corn	Sow outdoors: Mar 22 – Mar 29
Cucumbers	Sow outdoors: Mar 22 – Mar 29
Squash & zucchini	Sow outdoors: Mar 22 – Mar 29
Basil	Start seeds indoors: Feb 1 – Feb 15 Transplant outdoors: Mar 22 – Mar 29

Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 19 (8 weeks before the average first fall frost on Nov 14).

Useful for zone 8a gardens

Seed starting kit with dome — to start seeds indoors before the last frost
LED grow light for seedlings — stops leggy seedlings
Frost cloth / plant covers — for late spring and early fall frosts
Soil thermometer — warm-season crops need soil above 60°F

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Frost risk in detail

	90% chance	50% chance	10% chance
Last 32°F frost in spring is after	Feb 24	Mar 15	Apr 2
First 32°F frost in fall is before	Dec 2	Nov 14	Oct 29

How to read it: in spring there is a 10% chance of a frost after April 2, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 29. A hard freeze (28°F) usually ends around March 3.

Hardiness zone by ZIP code in Ardmore

73401 zone 8a
73402 zone 8a
73403 zone 8a

Nearby cities

Ada zone 7b, last frost Apr 2
Durant zone 8a, last frost Mar 31
Duncan zone 8a, last frost Mar 25
Norman zone 7b, last frost Mar 31
Shawnee zone 7b, last frost Mar 30
Chickasha zone 7b, last frost Apr 4
Moore zone 7b, last frost Apr 4
Midwest City zone 7b, last frost Apr 2

All cities in Oklahoma → · Other zone 8a cities →

Questions

What growing zone is Ardmore, OK?

Ardmore is in USDA Plant Hardiness Zone 8a (average extreme winter low 10°F to 15°F), according to the USDA 2023 map.

When is the last frost in Ardmore?

The average last spring frost (32°F) in Ardmore is March 15. There is still a 10% chance of frost until April 2.

When can I plant tomatoes in Ardmore?

Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 22 – Mar 29. Start seeds indoors 6–8 weeks before the last frost.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Ardmore, OK (USC00340292), 1.7 km (1.1 mi) from the city center, elevation 256 m, based on 14 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.